Page 130 - READING COMPANION TO ENGLISH EXAMS

For the questions 11–15, choose the best word For the questions 16–20, choose the best word
or expression to fill the spaces in the passage. or expression to fill the spaces in the passage.

The Hubble Space Telescope (HST) is one of (16)‑‑‑‑ hydrogen as a fuel source for
the most iconic and influential astronomical transportation is primarily because it can power
instruments ever created. Launched into low vehicles with zero emissions, thanks to fuel cells.
Earth orbit by the Space Shuttle Discovery in (17)‑‑‑‑, fuel cells have the potential to be two
1990, the HST (11)‑‑‑‑ valuable insights into the to three times as efficient as a petrol-powered
universe since then. With its 2.4-metre-diameter internal combustion engine. It is worth noting
mirror and a suite of scientific instruments, this that hydrogen cars are considered electric cars
telescope has observed distant galaxies, nebulae, since they are propelled by an electric motor.
stars, and planets, capturing breathtaking images However, (18)‑‑‑‑ battery-powered electric cars,
that have deepened our understanding (12)‑‑‑‑ hydrogen cars produce their own electricity rather
the cosmos. Hubble’s observations have helped than relying on an internal battery or an external
(13)‑‑‑‑ the age of the universe and refine the power source. This is achieved through the use
measurements of its expansion rate. (14)‑‑‑‑, it of an on-board fuel cell stack, which efficiently
has studied exoplanets, identified the composition converts the chemical energy of the fuel (19)‑‑‑‑
of distant atmospheres, and examined the life electrical energy. Fuel cells (20)‑‑‑‑ a process
cycle of stars. Even after decades, Hubble called reverse electrolysis, where hydrogen from
remains a vital tool in contemporary astronomy the vehicle’s fuel tank reacts with oxygen from
(15)‑‑‑‑ its continuing data transfer and the surrounding air. Consequently, this chemical
discoveries for cosmic comprehension. reaction generates solely electrical energy, heat,
and water vapour without releasing any harmful
11. pollutants.
A) has provided B) would provide
16.
C) had provided D) was providing
A) Utilising B) Having utilised
E) provided
C) Utilise D) Being utilised
E) Utilised
12.
A) by B) for 17.
C) of D) from A) Nonetheless B) Instead
E) in C) Moreover D) Even so

E) Therefore
13.
A) suppress B) determine 18.
C) disprove D) intricate A) such as B) in addition to
E) eliminate C) instead of D) similar to
E) unlike
14.
A) Instead B) Furthermore 19.
C) Therefore D) On the contrary A) with B) into
E) However C) over D) against
E) at
15.
A) due to B) despite 20.

C) as regards D) instead of A) pass down B) rely on
E) besides C) come across D) go through
E) take up

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